Elastic String: high quality elastic rubber,It is elastic stretchy and hard to break. Size: 0.5mm in diameter Color:white clear Product composition: 2 rolls white clear elastic string rope, total about 200m. It is widely used in bracelets, jewelry necklaces and handicraft beads making,especially beads with small aperture,It can also be easily worn in, and it is easy to knot and hide. If you have any questions about our products, you can click the "Seller Contact" button in your Amazon account to contact us. We will be happy to serve you and reply as soon as possible.